ื ืืืื ืืขืืขืจ. ืืื ืืื OTUS ืืึธื ืืฉืื , ืืืืืข ืื ืคืจืึทืกืืจืึทืงืืฉืขืจ ืืื ืึทืคึผืืึทืงืืืฉืึทื ื ื ืืฆื Zabbix, Prometheus, Grafana ืืื ELK. ืืื ืืขื ืึทืืืื ื, ืืืจ ืืจืึทืืืฉืึทื ืึทืื ืืืืื ื ืืฆืืง ืืึทืืขืจืืึทื ืืืืฃ ืืขืจ ืืขืืข.
ืคึฟืึทืจ ืคึผืจืึธืืขืืืขืืก ืึทืืึทืื ืืืจ ืฆื ืื ืกืืจืืืขื ื ืืึธื ืืืึธืจืื ื ืคืื ืคืื ืืจืืืกื ืืืง ืืึทืืื ืื ืืก ืืืจื ืืืืคึผ, ืืืืคึผืก, ืื ืก, ืืงืคึผ, ืืงืืคึผ. ืืื ืืขื ืึทืจืืืงื, ืืื ืืืขื ืืืืึทืื ืืืจ ืืื ืฆื ืฉืืขืื ืึทืจืืืฃ ืืืืคึผ / ืืืืคึผืก ืืึธื ืืืึธืจืื ื ื ืืฆื ืืืึทืงืงืืึธืงืก ืขืงืกืคึผืึธืจืืขืจ. ืืืจ ืืืขืื ืงืึทืืขืจ ืื ืืืึทืงืงืืึธืงืก ืขืงืกืคึผืึธืจืืขืจ ืืื Kubernetes.
ืื ืกืืืืืืข
ืืืจ ืืืขืื ืืึทืจืคึฟื ืื ืคืืืืขื ืืข:
- Kubernetes
- ืคึผืจืึธืืขืืืขืืก ืึธืคึผืขืจืึทืืึธืจ
ืขืงืกืคึผืึธืจืืขืจ ืืืึทืงืงืืึธืงืก ืงืึทื ืคืืืืขืจืืืฉืึทื
ืงืึทื ืคืืืืขืจ ืืืึทืงืงืืึธืงืก ืืืจื ConfigMap ืคึฟืึทืจ ืกืขืืืื ืืก http ืืืขื ืืึทืืื ืื ืืก ืืึธื ืืืึธืจืื ื ืืึธืืืืข.
apiVersion: v1
kind: ConfigMap
metadata:
name: prometheus-blackbox-exporter
labels:
app: prometheus-blackbox-exporter
data:
blackbox.yaml: |
modules:
http_2xx:
http:
no_follow_redirects: false
preferred_ip_protocol: ip4
valid_http_versions:
- HTTP/1.1
- HTTP/2
valid_status_codes: []
prober: http
timeout: 5sืืึธืืืืข http_2xx ืืขืืืืื ื ืฆื ืงืึธื ืืจืึธืืืจื ืึทื ืื ืืืขื ืกืขืจืืืืก ืงืขืจื ืึท HTTP 2xx ืกืืึทืืืก ืงืึธื. ืื ืงืึทื ืคืืืืขืจืืืฉืึทื ืคืื ืื ืืืึทืงืืึธืงืก ืขืงืกืคึผืึธืจืืขืจ ืืื ืืืกืงืจืืืื ืืื ืืขืจ ืืขืืึทื ืืื .
ืืืคึผืืืืื ื ืึท ืืืึทืงืืึธืงืก ืขืงืกืคึผืึธืจืืขืจ ืฆื ืึท ืงืืืขืจื ืขืืขืก ืงื ืืื
ืืึทืฉืจืืึทืื Deployment ะธ Service ืคึฟืึทืจ ืืืคึผืืืืืึทื ื ืืื Kubernetes.
---
kind: Service
apiVersion: v1
metadata:
name: prometheus-blackbox-exporter
labels:
app: prometheus-blackbox-exporter
spec:
type: ClusterIP
ports:
- name: http
port: 9115
protocol: TCP
selector:
app: prometheus-blackbox-exporter
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: prometheus-blackbox-exporter
labels:
app: prometheus-blackbox-exporter
spec:
replicas: 1
selector:
matchLabels:
app: prometheus-blackbox-exporter
template:
metadata:
labels:
app: prometheus-blackbox-exporter
spec:
restartPolicy: Always
containers:
- name: blackbox-exporter
image: "prom/blackbox-exporter:v0.15.1"
imagePullPolicy: IfNotPresent
securityContext:
readOnlyRootFilesystem: true
runAsNonRoot: true
runAsUser: 1000
args:
- "--config.file=/config/blackbox.yaml"
resources:
{}
ports:
- containerPort: 9115
name: http
livenessProbe:
httpGet:
path: /health
port: http
readinessProbe:
httpGet:
path: /health
port: http
volumeMounts:
- mountPath: /config
name: config
- name: configmap-reload
image: "jimmidyson/configmap-reload:v0.2.2"
imagePullPolicy: "IfNotPresent"
securityContext:
runAsNonRoot: true
runAsUser: 65534
args:
- --volume-dir=/etc/config
- --webhook-url=http://localhost:9115/-/reload
resources:
{}
volumeMounts:
- mountPath: /etc/config
name: config
readOnly: true
volumes:
- name: config
configMap:
name: prometheus-blackbox-exporterืืืึทืงืงืืึธืงืก ืขืงืกืคึผืึธืจืืขืจ ืงืขื ืขื ืืืื ืืืคึผืืืื ืืื ืื ืคืืืืขื ืืข ืืึทืคึฟืขื. ื ืึทืืขืกืคึผืึทืกืข monitoring ืจืขืคืขืจืก ืฆื ืคึผืจืึธืืขืืืขืืก ืึธืคึผืขืจืึทืืึธืจ.
kubectl --namespace=monitoring apply -f blackbox-exporter.yamlืืึทืื ืืืืขืจ ืึทื ืึทืืข ืกืขืจืืืืกืขืก ืืืืคื ืืื ืื ืคืืืืขื ืืข ืืึทืคึฟืขื:
kubectl --namespace=monitoring get all --selector=app=prometheus-blackbox-exporterืืืึทืงืงืืึธืงืก ืืฉืขืง
ืืืจ ืงืขื ื ืฆืืืจืื ืฆื ืื ืืืึทืงืงืืึธืงืก ืขืงืกืคึผืึธืจืืขืจ ืืืขื ืฆืืืื ื ื ืืฆื port-forward:
kubectl --namespace=monitoring port-forward svc/prometheus-blackbox-exporter 9115:9115ืคืึทืจืืื ืื ืฆื ืื ืืืึทืงืงืืึธืงืก ืขืงืกืคึผืึธืจืืขืจ ืืืขื ืฆืืืื ื ืืืจื ืึท ืืืขื ืืืขืืขืจืขืจ : ืงืกื ืืืงืก.
ืืืื ืืืจ ืืืื ืฆื ืื ืึทืืจืขืก , ืืืจ ืืืขื ืืขื ืื ืจืขืืืืืึทื ืคืื ืงืึธื ืืจืึธืืืจืื ื ืื ืกืคึผืขืกืึทืคืืื URL ().
ืืขืืจืืง ืืืขืจื probe_success ืืืืึทื ืฆื 1 ืืืื ืืฆืืื ืืฉืขืง. ื ืืืขืจื ืคืื 0 ืื ืืืงืืืฅ ืึท ืืขืืช.
ืืึทืฉืืขืืืงื ืคึผืจืึธืืขืืืขืืก
ื ืึธื ืืืคึผืืืืื ื ืื ืืืึทืงืงืืึธืงืก ืขืงืกืคึผืึธืจืืขืจ, ืืืจ ืงืึทื ืคืืืืขืจ ืคึผืจืึธืืขืืืขืืก ืืื prometheus-additional.yaml.
- job_name: 'kube-api-blackbox'
scrape_interval: 1w
metrics_path: /probe
params:
module: [http_2xx]
static_configs:
- targets:
- https://www.google.com
- http://www.example.com
- https://prometheus.io
relabel_configs:
- source_labels: [__address__]
target_label: __param_target
- source_labels: [__param_target]
target_label: instance
- target_label: __address__
replacement: prometheus-blackbox-exporter:9115 # The blackbox exporter.ืืืจ ืืืฉืขื ืขืจืืื Secretื ืืฆื ืื ืคืืืืขื ืืข ืืึทืคึฟืขื.
PROMETHEUS_ADD_CONFIG=$(cat prometheus-additional.yaml | base64)
cat << EOF | kubectl --namespace=monitoring apply -f -
apiVersion: v1
kind: Secret
metadata:
name: additional-scrape-configs
type: Opaque
data:
prometheus-additional.yaml: $PROMETHEUS_ADD_CONFIG
EOFืืืจ ืึธื ืืืืึทืื additional-scrape-configs ืคึฟืึทืจ ืคึผืจืึธืืขืืืขืืก ืึธืคึผืขืจืึทืืึธืจ ื ืืฆื additionalScrapeConfigs.
kubectl --namespace=monitoring edit prometheuses k8s
...
spec:
additionalScrapeConfigs:
key: prometheus-additional.yaml
name: additional-scrape-configsืืืจ ืืืื ืฆื ืื ืคึผืจืึธืืขืืืขืืก ืืืขื ืฆืืืื ื ืืื ืงืึธื ืืจืึธืืืจื ืื ืืขืืจืืงืก ืืื ืืึธืืื.
kubectl --namespace=monitoring port-forward svc/prometheus-k8s 9090:9090
ืืืจ ืืขื ืื ืืขืืจืืงืก ืืื ืฆืืื ืคืื ืืืึทืงืงืืึธืงืก.
ืึทืืื ื ืึผืืืื ืคึฟืึทืจ ื ืึธืืืึทืคืึทืงืืืฉืึทื ื (ืคืืื ืง)
ืฆื ืืึทืงืืืขื ื ืึธืืืึทืคืึทืงืืืฉืึทื ื ืคืื ืื ืืืึทืงืงืืึธืงืก ืขืงืกืคึผืึธืจืืขืจ, ืืืจ ืืืขืื ืืืืื ืึผืืืื ืฆื ืคึผืจืึธืืขืืืขืืก ืึธืคึผืขืจืึทืืึธืจ.
kubectl --namespace=monitoring edit prometheusrules prometheus-k8s-rules
...
- name: blackbox-exporter
rules:
- alert: ProbeFailed
expr: probe_success == 0
for: 5m
labels:
severity: error
annotations:
summary: "Probe failed (instance {{ $labels.instance }})"
description: "Probe failedn VALUE = {{ $value }}n LABELS: {{ $labels }}"
- alert: SlowProbe
expr: avg_over_time(probe_duration_seconds[1m]) > 1
for: 5m
labels:
severity: warning
annotations:
summary: "Slow probe (instance {{ $labels.instance }})"
description: "Blackbox probe took more than 1s to completen VALUE = {{ $value }}n LABELS: {{ $labels }}"
- alert: HttpStatusCode
expr: probe_http_status_code <= 199 OR probe_http_status_code >= 400
for: 5m
labels:
severity: error
annotations:
summary: "HTTP Status Code (instance {{ $labels.instance }})"
description: "HTTP status code is not 200-399n VALUE = {{ $value }}n LABELS: {{ $labels }}"
- alert: SslCertificateWillExpireSoon
expr: probe_ssl_earliest_cert_expiry - time() < 86400 * 30
for: 5m
labels:
severity: warning
annotations:
summary: "SSL certificate will expire soon (instance {{ $labels.instance }})"
description: "SSL certificate expires in 30 daysn VALUE = {{ $value }}n LABELS: {{ $labels }}"
- alert: SslCertificateHasExpired
expr: probe_ssl_earliest_cert_expiry - time() <= 0
for: 5m
labels:
severity: error
annotations:
summary: "SSL certificate has expired (instance {{ $labels.instance }})"
description: "SSL certificate has expired alreadyn VALUE = {{ $value }}n LABELS: {{ $labels }}"
- alert: HttpSlowRequests
expr: avg_over_time(probe_http_duration_seconds[1m]) > 1
for: 5m
labels:
severity: warning
annotations:
summary: "HTTP slow requests (instance {{ $labels.instance }})"
description: "HTTP request took more than 1sn VALUE = {{ $value }}n LABELS: {{ $labels }}"
- alert: SlowPing
expr: avg_over_time(probe_icmp_duration_seconds[1m]) > 1
for: 5m
labels:
severity: warning
annotations:
summary: "Slow ping (instance {{ $labels.instance }})"
description: "Blackbox ping took more than 1sn VALUE = {{ $value }}n LABELS: {{ $labels }}"ืืื ืื ืคึผืจืึธืืขืืืขืืก ืืืขื ืฆืืืื ื, ืืืื ืฆื ืกืืึทืืืก => ืึผืืืื ืืื ืืขืคึฟืื ืขื ืื ืคืืื ืง ืึผืืืื ืคึฟืึทืจ ืืืึทืงืืึธืงืก ืขืงืกืคึผืึธืจืืขืจ.
ืงืึทื ืคืืืืขืจืื ื ืงืืืขืจื ืขืืขืก ืึทืคึผื ืกืขืจืืืืจืขืจ ืกืกื ืกืขืจืืืคืืงืึทื ืขืงืกืคึผืืจืึทืืืึธื ื ืึธืืืึทืคืึทืงืืืฉืึทื ื
ืืึธืืืจ ืงืึทื ืคืืืืขืจ Kubernetes API Server SSL ืืึทืืืืึทืื ืขืงืกืคึผืขืจืืืฉืึทื ืืึธื ืืืึธืจืื ื. ืขืก ืืืขื ืฉืืงื ื ืึธืืืึทืคืึทืงืืืฉืึทื ื ืึทืืึธื ืึท ืืืึธื.
ืึทืืื ื ืื ืืืึทืงืงืืึธืงืก ืขืงืกืคึผืึธืจืืขืจ ืืึธืืืืข ืคึฟืึทืจ Kubernetes API ืกืขืจืืืืจืขืจ ืึธืืขื ืืึทืงืืืฉืึทื.
kubectl --namespace=monitoring edit configmap prometheus-blackbox-exporter
...
kube-api:
http:
method: GET
no_follow_redirects: false
preferred_ip_protocol: ip4
tls_config:
insecure_skip_verify: false
ca_file: /var/run/secrets/kubernetes.io/serviceaccount/ca.crt
bearer_token_file: /var/run/secrets/kubernetes.io/serviceaccount/token
valid_http_versions:
- HTTP/1.1
- HTTP/2
valid_status_codes: []
prober: http
timeout: 5sืึทืืื ื ืคึผืจืึธืืขืืืขืืก ืกืงืจืึทืคึผ ืงืึทื ืคืืืืขืจืืืฉืึทื
- job_name: 'kube-api-blackbox'
metrics_path: /probe
params:
module: [kube-api]
static_configs:
- targets:
- https://kubernetes.default.svc/api
relabel_configs:
- source_labels: [__address__]
target_label: __param_target
- source_labels: [__param_target]
target_label: instance
- target_label: __address__
replacement: prometheus-blackbox-exporter:9115 # The blackbox exporter.ื ืืฆื ืคึผืจืึธืืขืืืขืืก ืกืื
PROMETHEUS_ADD_CONFIG=$(cat prometheus-additional.yaml | base64)
cat << EOF | kubectl --namespace=monitoring apply -f -
apiVersion: v1
kind: Secret
metadata:
name: additional-scrape-configs
type: Opaque
data:
prometheus-additional.yaml: $PROMETHEUS_ADD_CONFIG
EOFืึทืืื ื ืคืืื ืง ืึผืืืื
kubectl --namespace=monitoring edit prometheusrules prometheus-k8s-rules
...
- name: k8s-api-server-cert-expiry
rules:
- alert: K8sAPIServerSSLCertExpiringAfterThreeMonths
expr: probe_ssl_earliest_cert_expiry{job="kube-api-blackbox"} - time() < 86400 * 90
for: 1w
labels:
severity: warning
annotations:
summary: "Kubernetes API Server SSL certificate will expire after three months (instance {{ $labels.instance }})"
description: "Kubernetes API Server SSL certificate expires in 90 daysn VALUE = {{ $value }}n LABELS: {{ $labels }}"ื ืืฆืืง ืืื ืงืก
ืืงืืจ: www.habr.com